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DPA422PN

更新时间： 2024-01-13 15:36:19
品牌 Logo 应用领域
帕沃英蒂格盛 - POWERINT /
页数 文件大小 规格书
20页 1071K
描述
DC-DC Forward Converter Design Guide

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DPA422PN 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：D2PAK包装说明：TO-263, 7/6 PIN
针数：4Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.87模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：75 V最小输入电压：16 V
标称输入电压：35 VJESD-30 代码：R-PSSO-G6
JESD-609代码：e0长度：10.29 mm
功能数量：1端子数量：6
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：1.31 A封装主体材料：PLASTIC/EPOXY
封装代码：TO-263封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：225
认证状态：Not Qualified座面最大高度：4.95 mm
表面贴装：YES切换器配置：SINGLE
最大切换频率：425 kHz技术：CMOS
温度等级：AUTOMOTIVE端子面层：TIN LEAD
端子形式：GULL WING端子节距：1.27 mm
端子位置：SINGLE处于峰值回流温度下的最长时间：30
宽度：8.405 mmBase Number Matches：1

DPA422PN 数据手册

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AN-31  
Description  
Symbol Min  
Typ  
Max Units  
Comment  
Input  
Input Voltage  
VIN  
36  
29  
48  
75  
36  
VDC  
VDC  
VDC  
VDC  
VDC  
Typical operational range  
Input Voltage UV Turn ON  
Input Voltage UV Turn Off  
Input Voltage OV Turn On  
Input Voltage OV Turn Off  
72  
90  
Output  
Output Voltage  
Output Ripple and Noise  
Output Current  
VOUT  
VRIPPLE  
IOUT  
4.8  
0
5.00  
50  
5.2  
V
mV  
A
±4%  
20 MHz Bandwidth  
6.00  
Line Regulation  
Load Regulation  
±0.2  
±0.5  
%
%
Transient Response Peak  
Deviation  
3
% of  
VOUT  
50-75% Load step, 100 mA/µs  
48 VDC input  
Transient Response Recovery  
200  
µs  
To 1% of final output voltage,  
50-75% load step, 48 VDC input  
Total Output Power  
Continuous Output Power  
POUT  
30  
W
Efficiency  
Low-Cost Design  
Enhanced (non-sync rect.)  
Synchronous Rectified Design  
ηCost  
84  
87  
91  
%
%
%
Measured at POUT (30 W),  
ηEnhanced  
25 °C, 48 VDC Input  
ηSyncRect  
Environmental  
Input-Output Isolation Voltage  
Ambient Temperature  
1500  
-40  
VDC  
°C  
TAMB  
85  
Free convection, sea level  
Table 1. Typical Specifications for a Single Output DC-DC Converter.  
Figure 1 shows a typical implementation of DPA-Switch in  
a power supply with a single regulated output. This design  
guide discusses considerations for selection of components  
for a practical implementation of the circuit in Figure 1. It  
also addresses options and tradeoffs in cost, efficiency and  
complexitythatincludethesubstitutionofsynchronousrectifiers  
and alternative generation of the bias voltage.  
designer must guarantee that the converter becomes active and  
fully functional at a voltage that is lower than the minimum.  
Tolerance variations of the Line Undervoltage Threshold of  
DPA-Switch with prudent design margin put the practical  
minimum operating voltage closer to 30 V. Similarly, the  
converter must be designed to operate at voltages higher than  
the maximum specified input. The actual input voltage range  
should be considered to be from about 30 V to 90 V for the  
typical nominal input voltage of 48 VDC.  
System Requirements  
The design begins with an evaluation of the requirements.  
Table 1 gives the specifications for the example converters  
described here, that have been constructed and evaluated as  
engineering prototypes. Variants of the basic design achieve  
higher efficiencies with minor increases in complexity.  
Output Characteristics  
The output voltage can be maintained to ±4% over the range of  
line, load and operational temperature range with an ordinary  
feedbackcircuitthatusesaTL431regulator.Transientresponse  
iscontrolledwithproperfrequencycompensation.Thedesignof  
thefeedbacknetworkwithguidanceforselectionofcomponent  
values is addressed in a separate section. Ripple and noise are  
strongly influenced by the size of the output inductor and the  
choice of output capacitors. These topics are discussed more  
thoroughly later in this document.  
Input Voltage Range  
The actual input voltage range required for operation of the  
converter is greater than that indicated by the specification. The  
specification requires the converter to operate and to deliver  
full performance at a minimum input of 36 V. Therefore, the  
C
2
7/04  
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